420412433441021 has 12 divisors (see below), whose sum is σ = 495939243132000. Its totient is φ = 355278112764120.

The previous prime is 420412433440981. The next prime is 420412433441059. The reversal of 420412433441021 is 120144334214024.

It is not a de Polignac number, because 420412433441021 - 2¹⁴ = 420412433424637 is a prime.

It is a super-2 number, since 2×420412433441021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420412433441821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60421444271 + ... + 60421451228.

It is an arithmetic number, because the mean of its divisors is an integer number (41328270261000).

Almost surely, 2^{420412433441021} is an apocalyptic number.

It is an amenable number.

420412433441021 is a deficient number, since it is larger than the sum of its proper divisors (75526809690979).

420412433441021 is a wasteful number, since it uses less digits than its factorization.

420412433441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120842895584 (or 120842895577 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 420412433441021 its reverse (120144334214024), we get a palindrome (540556767655045).

The spelling of 420412433441021 in words is "four hundred twenty trillion, four hundred twelve billion, four hundred thirty-three million, four hundred forty-one thousand, twenty-one".